Single Item, Package of 1.

New old stock (NOS), unused, genuine part: National LM78S40CN Universal Switching Regulator Subsystem, PDIP-16

Shipped in cut to size Anti-Static IC tube. Combined shipping available for quantities > 1.

Manufacturer: National Semiconductor
Manufacturer Part Number: LM78S40CN
Product Category: Switching Voltage Regulators
Output Voltage: 1.2 V to 40 V
Output Current, max: 1.5 A
Number of Outputs: 1 Output
Supply Voltage - Min: 2.5 V
Supply Voltage - Max: 40 V
Package / Case: PDIP-16, Plastic
RoHS: NO
Packaging: Anti-Static IC tube (cut-to-size)

Note: Date code may differ from picture. Part Number and Manufacturer are identical to what is shown.

Features
■ Step-up, step-down or inverting switching regulators
■ Output adjustable from 1.25V to 40V
■ Peak currents to 1.5A without external transistors
■ Operation from 2.5V to 40V input
■ Low standby current drain
■ 80 dB line and load regulation
■ High gain, high current, independent op amp
■ Pulse width modulation with no double pulsing

Description
The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regulator systems. The device consists of a temperature compensated voltage reference, a duty-cycle controllable oscillator with an active current limit circuit, an error amplifier, high current, high voltage output switch, a power diode and an uncommitted operational amplifier. The device can drive external NPN or PNP transistors when currents in excess of 1.5A or voltages in excess of 40V are required. The device can be used for step-down, step-up or inverting switching regulators as well as for series pass regulators. It features wide supply voltage range, low standby power dissipation, high efficiency and low drift. It is useful for any stand-alone, low part count switching system and works extremely well in battery operated systems.